Stationary piston pttmp



March 8, 1932. C NELSQN 1,848,648

S TATIONARY PI STON PUMP Filed Feb. 28, 1931 2 Sheets-Sheet l gwuen io'a Z 37, flNeZsorz March 8, 1932. NELSON 1,848,648

STATIONARY P I STON PUMP Filed Feb. 28, 1931 2 Sheets-Sheet 2 6 gwuewtoi 6 Patented Mar. 8, 1932 PATENT OFFICE ARTHUR NELSON, OF ALEXANDRIA, MINNESOTA STATIONARY PISTON PUMP Application filed February 28, 1931. Serial ,No. 519,220.

This invention relates to pumps and particularly' to pumps wherein a stationary piston is employed and the cylinder with the check valves thereof are vertically shifted relative to the piston, pumps of this general character being disclosed in my patent granted on April28, 1931, No. 1,802,827 and in my application for patent, Serial No. 478,426, filed August 28, 1930.

A further object is to provide a pumping head-which is counterbalanced as regards the cylinder and the reciprocating discharge lift pipe so that the lift actually required tooperate the pump is reduced to the actual weight of ,the fluid to be elevated and thus permit less power to be used for any given lift or pump specification.

vA further object is to provide improved means whereby access may be had to the stuffing boxes through which the pump rod passes to provide a counter-balanced walking beam and provide guides for the pump rod carried at one end of the walking beam and for the counter-balancing thereof, to provide means for pivotally supporting the walking beam for swinging movement in a vertical plane, to thus permit the pump rod end of the walking beam to move rectilinearly.

Another object is to provide means for so bracing the pump body from the base upon which the walking beam support and the counterbalance guides are mounted that the pump body cannot get out of proper alinement' Other and more detalled ob3ects will appear in the course of the following description. t

My invention is illustrated in the accompanying drawings, wherein Figure 1 is a vertical sectional view through a hand operated pump constructed in accordance with my invention;

Figure 2 is a section on the line 2-2 of Figure 1;

Figure 3 is a fragmentary section on the line 3-3 of Figure 1;

Figure 4 is an elevation of the pivoted standard which supports the walking beam, the walking beam being shown insection;

Figure 5 is an enlarged vertical section through the lower end of the pump;

Figure 6 is a section on the line 6-6 of Figure 5;

Figure 7 Figure 5;

Figure 8 is a section on the line 8-8 of Figure 1;

is a section on the line 7-7 of Figure 9 1s a section on the line 9-9 of Figure 1.

Referring to these drawings, 10 designates a base upon which the walking beam or operating mechanism of the pump is mounted, and 11 is the pump body having an enlarged base 12, the base 10 having a flange 13 fitting over this base 12 as illustrated in Figure 9.

The pump body extends upward from the base 12' and then is enlarged to form a chamher 14, this chamber being closed at one side by a removable plate 15 as shown in Figure 3. The pump body then extends straight upward and is formed with the spout 16. At its upper end, the tubular pump body is provided with the stuffing box 17 and gland 18 as shown in Figure 1. Attached to the upper end of the pump body is a yoke 19 through which the upper section of the piston rod of the pump passes and'is guided.

Pivoted upon of a'walking beam support 20. The lower end of this support is bifurcated as at 21 (see Figure 4) and the lower extremities of this fork are inserted between the cars 22 and held the base 10 is the lower end in place by the pintle 23. The walking beam 24 extends downward between ears 25 on the upper end of the rocking post 20 and is pivoted thereto by means of the pivot pin 26. The middle portion of the Walking beam is upwardly extended as at 27, this upward eX- tension being bored out for the reception 0 a handle 28 held in place by the set screws 29. One end of the walking beam is pivotally connected to the pump rod 30 at 31. The opposite end of the walking beam is pivotally connected to a link 32 as shown in Figure 2, this link at its lower end in turn carrying a laterally projecting pin 33 constituting trunnions disposed in ears 34 carried by a counterweight'35. This counter-weight is preferably formed in a plurality of sections, the sections being held together by the bolts 36. The counter-weight is guided in its vertical movement by the upright guides 37 These guides are connected at their lower ends by an integral transverse bar 38 rockingly mounted in ears 39. The upper ends of the guides are connected by a cross bar 40.

Bra'ces4l extend downward and inward from the extremities of the cross bar 40 and are connected as shown in Figure 3 to the upper end of the pumpbody. The braces 42 extend downward from the upper end of the pump body and outward and engage the base 10, thus supporting the pump body in proper relation to the base and supporting the guides 37 in proper relation to" the pump body. The weights 35 are provided-with eyes 43 which embrace the guides 37 and slide thereon. It will thus be obvious that any oscillation of the walking beam 24 or operating, lever by means of the handle 28 will cause the reciprocation ofthe pumprod 30.

The pump rod 30 passes through the gland in the stufling box 17.-18 and isconnected by a coupling 44 to a pipe 45 which at its lower end. opens into an'elongated cylinder 46 as shown most clearly in Figure 5. Thiscylinder adjacent its upper end is formed with an inwardly projecting annular flange 46 upon which is mounted the valve seat 47 having the cage 48 and ball valve 49. Adapted to'telescope and reciprocate within the lower portion of the cylinder'40 is a tubular piston 50,

the upper end of which carries the valve seat 51 and ball valve 52, the valve seat being screwed"intothe-upper end of the cylinder 50.

Approximately midway of its length, the piston. 'is formed with an outwardly projecting annular stop 53or shoulder and at a distance-from this stop 53, the exterior of the piston is screw-threaded at 54 for the reception of a collar 55. Disposed between this collar 55 and the shoulder 53 isan annulus 56 and extending downward from the lower end of'the cylinder40 are a plurality'of, stud bolts 57 constituting guides which extend'down through this collar 56 with which guides the collar has sliding engagement. Thus it will be seen that the piston 50 may move downward with reference to the cylinder '40 a distance equal to the length of the guides 57 which are provided at their lower ends with the headsor nuts 58 constituting stops or that the piston may be moved upward until the shoulder 53strikesthe lower end of the cylinder 40.

Below'the screw-threaded portion 54, the cylinder is reduced in external diameter at 58 and has screw-threaded engagement with an annular head 59 which constitutes a coupling andhas screw-threaded engagement with a terminal pipe 60. j This pipe 60 has a uniform internal diameter but from a point distanced from the head or collar 59, the exterior face .cumbent tubing. a The operation of the mechanism is as folof this a pipe 55 tapers downwardly to the lower end of the pipe.

Extending downward from the coupling or collar 59 are a plurality of guide rods 61 having nuts 62 at their lower ends constituting stops and slidable upon these guide rods are the .wedging segments 63 which are provided each with a radial slot 64through which the rods 61 pass. These rods, as shown in Figure 7 are slightly flattened where they pass through the slots 64- so as to fit the slots and prevent the segments from turning upon the rods. These segments have their inner faces inclined complementarily to the taper oft-he outer face of the pipe 60. Thus it will be obvious that as the segments'move upward on this tapered surface, they will be forced outward and that when they move downward, they will be allowedto move inward. These segments '63, therefore, are

cords 66 which extend to the. severaliseginents. When thepump isfirst installed in V the well, the segments are allowed to drop down to the lower endoof the rod 61 and then the cylinder and the piston are lowered in the well. WVhen a proper position within the wellis reached, the cable is drawnupward, which draws-the segments upward and causes them. to expand. against the. wall of the well under the weight of the superenlows 1- 7 I;

Upon an upwardmovement of the vpump rod 30, the pipe 45 and the cylinder 40 are raised relative to the piston. Any Water 3": which may be in the tubular: piston is, therefore, drawn upwardpast the valve 52vand into the space between this'valve 52 and the valve 49. Upon a downward movement of the cylinder 40, the valve 49 will open and the valve 52'will close and the water that is in the space between the two valves will be forced out into the pipe 45 and thus eventually c'arried upward through the pipe 45 and discharged through an aperture 67 formed in the coupling 44 and thus dischargedout through the spout 16. A stulfing box- 68 provided just below the'spout prevents the water from draining downward and'back into the well. The gland of this stufling boxmay be controlled, removed or replaced when the plate 15 is removed.

. It will be obvious now that by reciproeating the pump rod, water ateachreciprocation will be forced upward and discharged T from the spout 16. The counterweight is just sufficient to fully counterbalance the string of tubing 30, a5, and cylinder so that the only weight which has to be lifted by a depression of the handle 28 is the actual weight of the water being lifted in the pipe above and below the check valve 49. The walking beam is mounted upon an oscillating post 20 for the purpose of securing a true rectilinear movement for the pivotal connection 31 between the walking beam and the pump rod 80. The handle 28 is adjustable inward or outward with reference to the walking beam so that any desired leverage may be secured.

Upon an upward movement of the handle 28, the weight of this tubing will be counterbalanced by the counter-weight, thus rendering the pump very easy to operate.

Attention is called to the fact that the rods while limiting the degree of relative movement between the cylinder 40 and the piston, do not, because of the rotatable collar 56 prevent relative rotation between the cylinder 40 and the fixed piston. Thus, this construction allows for any torque in the reciprocating discharge lift pipe 45 and between the pumping head or cylinder 40 and the stationary piston. I have found this to be a very important feature of this invention.

While I have illustrated details of construction and arrangement of parts, I do not wish to be limited thereto, as obviously many changes might be made in these details without departing from the spirit of the invention as defined in the appended claims.

I claim 1. A pump including a lift pipe, a walking beam pivoted at one end to said lift pipe, a post upon the upper end of which the walking beam is pivotally mounted, means pivotally supporting the lower end of the post to permit the post to move toward or from the lift pipe, vertical guides, a counterweight slidably mounted upon the guides, and a link operatively connecting the counterweight to the walking beam at a point remote from its connection to the lift pipe.

2. In a pump of the character described, a pump body, an operating rod extending vertically through the pump body, a walking beam connected at one end to the operating rod, a base, a support for the walking beam and to which the walking beam is pivoted, said support being swingably mounted upon the base for movement toward or from the body, a counterweight on the opposite end of the walking beam from the operating rod, and guides for the counter-weight formed of a U-shaped member to provide a horizontal bar and two upwardly extending arms, the arms acting as guides for the counter-weight, the horizontal bar being swingably mounted upon said base.

3. In a pump of the character described, a

pump body, an operating rod extending vertically through the pump body, a guide mounted upon the pump body and through which the operatlng rod passes, a walking beam connected at one end to the operating rod below said guide, a support for the walking beam and to which the walking beam is pivoted, said support being swingably mounted upon the base for movement toward or from the body, a counter-weight on the opposite end of the walking beam from the operating rod, and vertical guides for the counter-weight, operatively connected to each other and pivotally mounted upon the base.

4. In a pump of the character described, a pump body, an operating rod extending vertically through the pump body, a guide mounted upon the pump body and through which the operating rod passes, a walking beam connected at one end to the operating rod below said guide, a support for the walking beam and to which the walking beam is pivoted, said support being swingably mounted upon the base for movement toward or from the body, a counter-weight on the opposite end of the walking beam from the operating rod, vertical guides for the counter-weight operatively connected to each other and pivotally mounted upon the base, and braces extending diagonally downward from the upper ends of said guides and connected to the pump body, and braces extending from the pump body to said base.

5. In a pump of the character described, a pump body, an operating rod extending vertically through the pump body, a base engaging the pump body, a walking beam connected at one end to the operating rod, a support for the walking beam swingably mounted upon the base for movement in a vertical plane, the walking beam being pivotally mounted upon said support, a counterweight for the end of the walking beam opposite the pump rod, a linked connection between said counter-weight and the adjacent end of the walking beam, vertical guides for the counter-weight, said guides being mounted upon the base at their lower ends, braces operatively connecting the upper ends of the guides to the pump body, and braces connecting the pump body to the base.

In testimony whereof I hereunto affix my signature.

ARTHUR O. NELSON. 

